fix：issue 1420 (#1620)

Author: mroccyen

core/src/main/java/feign/Contract.java

@@ -133,7 +133,8 @@ protected MethodMetadata parseAndValidateMetadata(Class<?> targetType, Method me
 
         if (parameterTypes[i] == URI.class) {
           data.urlIndex(i);
-        } else if (!isHttpAnnotation && parameterTypes[i] != Request.Options.class) {
+        } else if (!isHttpAnnotation
+            && !Request.Options.class.isAssignableFrom(parameterTypes[i])) {
           if (data.isAlreadyProcessed(i)) {
             checkState(
                 data.formParams().isEmpty() || data.bodyIndex() == null,

core/src/test/java/feign/OptionsTest.java

@@ -30,10 +30,19 @@
 @SuppressWarnings("deprecation")
 public class OptionsTest {
 
+  static class ChildOptions extends Request.Options {
+    public ChildOptions(int connectTimeoutMillis, int readTimeoutMillis) {
+      super(connectTimeoutMillis, readTimeoutMillis);
+    }
+  }
+
   interface OptionsInterface {
     @RequestLine("GET /")
     String get(Request.Options options);
 
+    @RequestLine("POST /")
+    String getChildOptions(ChildOptions options);
+
     @RequestLine("GET /")
     String get();
   }
@@ -68,4 +77,17 @@ public void normalResponseTest() {
 
     assertThat(api.get(new Request.Options(1000, 4 * 1000))).isEqualTo("foo");
   }
+
+  @Test
+  public void normalResponseForChildOptionsTest() {
+    final MockWebServer server = new MockWebServer();
+    server.enqueue(new MockResponse().setBody("foo").setBodyDelay(3, TimeUnit.SECONDS));
+
+    final OptionsInterface api =
+        Feign.builder()
+            .options(new ChildOptions(1000, 1000))
+            .target(OptionsInterface.class, server.url("/").toString());
+
+    assertThat(api.getChildOptions(new ChildOptions(1000, 4 * 1000))).isEqualTo("foo");
+  }
 }